Lantern slide



J. R. FREMAN LANTERN SLIDE Filed Nov.'10, 1923 amena-snee: l

June 21, 1927.

@Aw/lag' v June 21 1927.

J, R. FREEMAN -LANTERN SLIDE- Filed Nov. 1o, 1923 2. Sheets-snee*` 2 A lNvENToR Jan Rfeeznaz.

BY v v ATTO NEY .l

il, i.

Patented June 21, 1927.v

JOHN E. FREEMAN, E PEovIDENcEnHoDE ISLAND. I

LANTERN SLIDE.

A'pplvcationled November 1Q, 1923. Serial No. 674,085. l

The present invention relates to picture projecting devices, such as magic lanterns, stereopticons and thelike, and more particularly relates to the pictuie slidesA for these devices, and one object of the invention is 4tofprovide the picture slides witlrmeans whereby the operator when 'in the dark is enabled to insertthe slide in operative position in the slide box or slide carrier.

.Another object is to provide the slide ref ceptacle or slide box with means which indicatesv to the operator that the slide is in operative position -in the slide receptacle orc -slide box, or will indicate to him that he has incorrectly inserted the slide, this means being removable for permitting use in the de,- vice of customary slides. Y

. These and other features, capabilities and advantages of the invention will appear from the subjoined detailed description of; embodiment of the invention illustrated Vin the accompanying drawings in which Figure 1 is a side View of one of my slides in the `hand of the operator and indicating that the slide is in proper position for in sertion in the device;

Fig. k2 isa perspectivelview of a magic lantern, 'from the rear'thereof, showing in dot and dash lines one ofV mygslides therein and the ineans vcooperating therewith for positioning the slides in the slide receptacle;

Fig. 3 is a fragmentary rearl view of fa magic 'lantern .and one of my slides inoperative position therein and inengagement with the slide positioning'means; Y

Fig. 4c is a fragmentary rear view of a magic lantern and one of my slides incorrectly inserted therein and in engagementk with the positioning means, whereby the` incorrect position of the slide is indicated Fig. 5 illustrates in perspective a connected slide and coverglass in which .theslide' is clipped;4 y

Fig. 6 illustrates in perspective a eonnect-l ed slide and cover glass in which the cover is clipped;

Fig. 7 shows a connected slide land coverA glass in which both the slide and cover glass are clipped; v

Fig. 8 represents a side.. elevation of a simple slide in the correctposition for use in a stereopticon lantern;

Fig. 9 illustrates the same slide as shown in Fig. 8 in reverse position; n

Fig. 10. illustrates the slide of Fig. l8

in reverse' and inverted position;

-Beferring to F ig. 1, the picture slide 10,V

which is of the customary rectangular forni, hasl a portion. clipped from one corner of its .inargimthereby providing i,an inclined por-y tion 11 connecting a side and adjacent end of the slide, the portion 11 by contact with the index finger of theoperator serving to indicatey to him in the dark that the slide is held in. correct position for insert-ion in the picture vprojectimg; device 'gin operative relation thereto. y Y

Iteferringl to Figs. 3v and 4, I provide'the slide receptacle orbox 12. of the picture projectingdevice, in the present instance a magic lantern, with a pin or peg 13 which is insertable through a hole'lll in the outer wall 'of the box 12 andengageablewith the inner wall of the box, orit may be seatedrin a suitable, mannenvnot shown, in the inner wall of the box, the pin 13 being so arranged relative to the box 12 that wheny the picture slide is in operative position in the box, the inclined portion 11 of theslide will engage the periphery of the pin 13 and further insertion of the slide will be prevented. In the event of inadvertency of the operator and` incorrect insertion-by him of the slide in the box 10, the. periphery of the `pin 13 will engage the straight end 15 ofthe slide Vand at once indicate tothe operator his inistake.

' For the use lofpict'ure slides ofthe customary form the pin 13 yis removed.

In Fig. 5 there is illustrated another form '10o l' of the invention in which. the slide y20 has one ofnits corners.- clipped to form the intoo being secured together by a suitable border binding 27. I l

In Fig, 7 there is illustrated still anotherform in which bothV the slide 28 and the cover glass 29 liaveltheii corners clipped to form the alined inclined portions 04, the slide 28 and cover glass 29 here too being secured together by alsnitable border .bind-' ing 3l.

Of course it is understood that with the constructions illustrated in Figs. 5 and @the peg 13 must be reinoved'beiore the slide can Y be inserted intotlie proj'ectino` machine.

this means, it is possible to dispense altogether with the pin or peg 18 which is insertedin the hole 14 of the boX l2 so as to prevent any slide from being inserted in the wrong position.

In other words by the modification shown in F 12 and 13 it is possible to prea-r-` range the slides in the correct position before the stereopticon performance is to be started and then present the slides inthe slide receptacle of the stereo-pticon device at any desired speed, but always in correct po'- sition, since the operator in the dark needs butto drawv his hand along the edge of the receptacle 36 to notefwhether there -is any' slide which is not in proper position. Since the slide may be placed in any of four different positions as shown in Figs.l 8

to ll inclusive, it isof course advantageous- 1 to have the slides in correct order. By means of the inclined or clipped corner 37 there can be only one correct position, thatl shown in Fig. 8, sinc'eiall the positions of the slide will result in the clipped corner 37 being absent from the upper left or right corner of the slide the case may be, and notice thereof easily ascertained by the sense of' feeling of the operator in the dark.

No attempt is being made inthe applica.-` tion to claim a receptacle of specificlshape to hold these slides, the feature in this Vapplication being solely to the novel construction ofthe picture slide member.4

In the appended claims the term picture slide willzbe understood to mean eitheia plain picture containing slide such as illustrated in Fig. l or a slide with the cover ,glass secured V thereto as illustrated in Figs. 5,6and 7. y

It is obvious that various changes land modifications may be made to the ,details of construction withoutV departing from the general spirit ofthe invent-ion as set forth in the appended claims. Y.

VWhat l claim and desire to Vprotect by kLetters Patent is.:

" l. A lai'itern 'slide adapted to co-function lwitlijaplurality of lantern slides,'said slide comL arisinO' a icture containinod late having a clippedco-rnema glass cover having a Y clipped corner, and means for securing the glass cover to said plate with the vclipped corners registering` witlijone another whereby the slides'would co-function with onej another` to facilitate arrangingthem in proper position preparatory to insertion in approjecting machine and4 whereby each Yslide would individually function to facilitate proper insertion 'in-a projecting machine.

2. The .combination with aV picture projecting device having a picture slide lreceptacle, of a pictureslide insertable'V in said receptacle v andl having an edge'portion adapted for indicating in the dark bythe sense of touch ofthe operator therfproper..

position ofthe slide for-insertion thereof in said slide receptacle; and means insertable in said slidel receptacle and engageable with said indicating portion of the picture slideV for determining the proper position ofthe slide in saidreceptacle. l v- 3. The combination, with a picture pro jecting device having a picture slide receptacle, of apicture kslide insertablein said receptacle, said slide having an inclinededge portion for indicating the proper inserting e portion of the slide in the dark, and rmeans insertable in said;v slide receptacleand. en V gageable with the inclined edge portion of the picture'slide for determining the proper position of the slide in said receptacle.

' 4. The combination, with a Ipicture proy jecting device having a picture slide receptacle provided with' opposed walls, of a picture slide having anedge portion adapted for indicating' in the dark by the sense of touch of the'operator the properY position of thev slide 'for insertionrthereofin said slide receptacle and means passingthroughone of said walls and engageable with said indicating portion of theipicture slide for determining the proper position of the slide i-n said receptacle between said walls.V l

5. The combination, vwith a picture pro' jecting device;havingv a picture s'li'derecepg tacle provided with opposed'walls, of a` pic- Y ture slide insertable in said receptacle, and,

lhavingan inclined edge portion; and a removable pin passing through one 0f said walls and engageable with the inclined edge portion'of the picture slide fordetermining the proper position of the slide in said receptacle between said walls.

- 6'. Ina picture projecting device, the combination withy af picture vslide receptacle of a picture slide insert'able in saidreceptacle and having means thereon for indicating in the slide indicating means for determining the' proper position of the slide in said receptacle.

7. In a picture projecting device, the comhination With a'picture slide receptacle, of

a picture containing slide, having an inclined edge portion, a rectangular glass cover attached to said slide,and means insertan-1e in the slide receptacle and engageable with the inclined edge portion for determining the proper position of the said slide in l,said receptacle..

8. In a picture projecting device, the coin-y bination with a picture slide receptacle of a picture containing slide, and glass cover .attached thereto, one having an inclined edge yportion and the other a rectangular config' uration, and means insertable in said slide receptacle and engageable with the inclined `edgeportion of the picture slide for deterl mining the proper `position of the slide in '25 said receptacle.k e Y JOHN R. FREEMAN. Y 

